Grinding-mill



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' DE LONSON E. BARNARD.

GRINDING MILL. No. 569,671. Patented Oct. 13, 1896.

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the grinding'chamber B UNITED STATES PATENT FFICE.

"DE LONSON ELROY BARNARD, OF BELOIT, XVISCONSIN.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 569,571, dated October 13, 1896.

Application filed November 18, 1895. Serial No. 569,297. (No model.)

To aZZ whom it may concern:

Be it known that I, DE LONSON ELROY BARNARD, a citizen of the United States, residing at Beloit, county of Rock, and State of Wisconsin, have invented certain new and usefullmprovements in Grindin g-Millswhich are fully set forth in the following specification, reference being had to the accompanying drawings, forming a part thereof.

This invention relates to mills for grinding grains and other like material.

It consists of the features of construction set forth in the claims.

Figure 1 is a plan of my improved grinding-mill. Fig. 2 is avertical section at the line 2 2 on Fig. 1. Fig. 3 is a detail section at the line 3 3 on Fig. 1, designed to show principally certain details of the gearing and governing mechanism. Fig. at is a plan of the revolving grinder.

This mill is designed to be sec ured to asupport or post A, and the body or main casting B of the mill has flanges B, by which it is so secured. This casting of the body comprises, further, a grinding-chamber 13 having a discharge-spout 13 the inlet or vestibule of said chamber B and the feed-hopperl3- leading thereinto.

B is a boss at the upper side of the vestibule or inlet chamber B which affords the upper bearing for the vertical driving-shaft O. A lower bearing for said shaft is obtained in the hub or boss D at the center of the bottom plate D of the grinding-chamber. The grinding is done by a live or rotating grinding-ring E, interposed between two stationary grinding-rim gs E and E located, respectively, above and below the live ring E. The live ring is carried by a collar F, called the live-ring carrier, which is feathered on the shaft 0, whereby it is adapted to be rotated by the shaft, but is free to slide vertically thereon.

The upper fixed grinding-ring E is mounted rigidly upon the under side of the iipperwall of the grinding-chamber B The lower stationary grinding-ring E is mounted upon a carrier-ring G. This carrier-ring is peripherally threaded at g and screwed into the interiorly-threaded annular boss B which protrudes from the inner surface of the wall of The carrier-ring G has a peripherally-cogged annular flange G extending below its threaded periphery and adapted to be engaged by a pinion H, which is fastened on a shaft H, for which the upper bearing is formed at b in a gearingchamber B, which is formed at one side of the grinding-chamber B and comprises the movable cap or front plate B adapted to inclose the pinions which are housed in said chamber.

By the rotation of the pinion H the carrier G of the lower fixed grinder E being rotated in its threaded support at g in the boss B of the grinding-chamber, is raised and lowered at will. The live grinding-ring E is adapted to be adjusted vertically by the adjustment of the bottom plate D, on which the carrier F of the live grinder is stepped at f, which represents a brass step mounted upon the upper end of the hub D of the said bottom plate D within an oil-cap D whereby the step-bearing is kept supplied with oil. bottom plate D is screwed into the chamber 13 at d, where it is peripherally threaded, to engage the interiorl-y-threaded annular boss B of the chamber B The bottom plate D has an upwardly-projecting annular cogged flange D which is engaged and actuated by the pinion J on the sleeve or tubular shaft J, which is penetrated by the shaft H, and thereby affords the bearing for the latter shaft, being itself journaled in the bearing B at the lower side of the gearing housing or chamber 13.

Hand-wheels H and J respectively, at the lower ends of the shafts H and J, serve to rotate said shafts independently, and there by enable the operator to adjust vertically the lower fixed grinder and the intermediate live grinder, and so to space the three grinders as required by the work. I obtain a great advantage by supporting and adjusting the grinders at the peripheries of their respective holders, to wit, at cl and g, because when thus supported and adjusted absolute parallelism of movement in making the adjustments is insured and the grinders are kept separated uniformly throughout their circumferences and are not liable to be sprung to separate them more at one side or the other in their work.

The lower grinding-surface of the upper fixed grinder E is dished or conically concave and spirally ribbed or toothed, as seen in the drawings, so that there is formed between it and the live grinder a grain-receiving mouth The lar teeth, corresponding in depth more nearly to those of the lower surface of the live grinder. The live grinder is penetrated by two circular series of apertures E and E", said apertures being oblique to the axis, diverging therefrom downwardly. The purpose of these apertures is to permit a portion of the grain which is cracked between the upper fixed grinder and the upper surface of the live grinder at its first entrance between them to pass through the live grinder and be further ground between the lower surface of that grinder and the lower fixed grinder E thus dividing the work, after the first cracking is done, between the two months or grindingspaces, which are formed, respectively, above and below the live grinder and between the same of the upper and lower fixed grinders, respectively. The advantage of thus dividing the work is very marked, nearly doubling the capacity of' the mill, because finishing grinding is done on both sides of the live grinder and the small area adapted to crack the grain is sufficient to keep the larger area of finishing-surface, which is obtained from the whole lower surface and outer half of the upper surface of the live grinder, supplied with grain.

In order to regulate the supply of grain to the grinders according to the speed at which they are running and the work which they are thereby made capable of doing, I employ an inner lip or grain-shut-off ring K to close the annular receiving-mouth between the upper fixed grinder and the live grinder, such ring being fitted closely, but adapted to slide easily within the vestibule or inlet chamber B being operated by straps K K, which are secured to the ring K at opposite sides and extend up through the inlet chamber B emerging at opposite sides of the shaft-bearing B These straps are secured at their upper ends to a collar L, which forms the non-rotating member of an annular swivel, of which the ring L constitutes the rotating member and is engaged between the upper and lower flanges L L of the ring L, either of said rings being adapted to be parted in any convenient manner to admit the ring L between the fianges. The ring L has diametrically opposite gudgeons L L which are engaged in the slots m at the extremities of the arms M of the bell-crank lever, which are fulcrumed at'n on the web of the wheel N,which is pinned fast by its hub N on the shaft 0. The arms 11 of the bell-crank lever terminate at the upperen ds in balls M which are connected by extensible springs O, which ten d tohold the balls together and in toward the shaft, so that rotation of the shaft tends to separate them and lift the arms N of the bell-crank levers, and thereby draw upward the lip K and open the mouth between the upper fixed grinder and live grinder to a degree corresponding to a speed of rotation of the shaft.

The wheel N, which for the purpose of the governor might be considered merely as a cross-head on the hub N, serves to communicate to or receive motion from the horizontal shaft P, on which a corresponding beveled gear P is mounted between the bearings which are provided for said shaft at 13 and Birespectively, on abracket-arm of the main frame casting B.

Q is a wheel which serves both as a flywheel and a power communicating and receiviu g wheel, mounted at the extremities on outer bearing 13 on the horizontal shaft P.

This mill being designed for attachment to windmills which are also intended for other work, the vertical shaft is provided with a clutch-coupling R for connecting it with a vertical shaft of the windmill, and when it is thus driven power may be taken off the horizontal shaft through the band-wheel or otherwise for other work.

The lower end of the shaft is also provided with a clutch-coupling R below the mill, through which power may be taken for other work. Power may also be drawn directly from the lower end of the shaft 0 or the other shaft P, and in such case connection from other mechanism may be made at either of the other two points at which the shafts emerge.

I claim 1. In a grinding-mill in combination with a horizontal rotating grinder; two non-rotating grinders facing respectively the upper and lower faces of the rotating grinder; the latter being free to rise and fall between the non-rotating grinders and provided with a stop other than the lower grinder to limit its approach to the latter.

2. In a grinding-mill in combination with a horizontal rotating grinder two non-rotatin g grinders respectively above and below the rotating grinder, the lower of the non-rotatin g grinders being vertically adjustable; the rotating grinder being free to rise and fall between the other grinders and provided with an adjustable stop to limit its approach to the adjustable grinder.

3. In a grinding-mill in combination with the case having acylindrical chamber; a nonrotating annular grinder secured rigidly within the case at one end of the cylindrical chamber next to such fixed grinder; an annular non-rotating grinding-disk and an annular carrier to which the same is rigidly secured;

the carrier being peripherally threaded and the case being interiorly threaded to receive the same, whereby the last-mentioned grinder may be adjusted in the case toward and from the first-mentioned fixed grinder; and a rotating grinder located between the two, having its shaft extending through their central openings.

i. In a grinding-mill in combination with upper and lower horizontal non-rotatin g annular grinders; a rotating grinder located between them, and a carrier to which it is rigidly secured; the shaft of the rotating grinder extending through the central openings of the annular non-rotating grinders, the carrier of the rotating grinder being free to rise and fall with its grinder independently of its shaft by which it is rotated, and an adjustable stop for such carrier to limit the approach of the rotating grinder to the lower fixed grinder.

5. In a grinding inill in combination with upper and lower horizontal non-rotating annular grinders; a rotating grinder located between them having its shaft extending through their central openings and a carrier by which the said rotating grinder is supported, such carrier being free to move up and down independently of the shaft, but adapted to be rotated by the latter; the upper fixed grinder being rigidly secured to the,

top of the case, the carrier of the lower fixed grinder being peripherally threaded and screwed into the case whereby it is adapted to be adjustable toward the upper fixed grinder; the lower end of the case having an opening adapted to admit the upper fixed grinder and the carrier of the lower grinder and being interiorly threaded at such opening; the bottom plate peripherally threaded and adapted to be screwed in such opening and centrally pierced to admit the shaft and provided with a step about such central opening; the carrier of the rotating grinder being supported on such step, whereby the bottom plate carries a stop to limit the approach of the rotating grinder to the lower non-rotating grinder,and such stop is adjustable by rotating the bottom plate in its threaded connections to the case.

6. In a grinding-mill havingahorizontal rotating grinder, a non-rotating grinder above and below the same; the upper fixed grinder having an annular opening and no other through which the grain is admitted, and the rotating grinder having apertures extending through it from its upper to its lower grinding-surface; the upper opening of such apertures being at a distance outward from the margin of the annular opening, and the lower mouth of said apertures being above the grinding-surface of the lower fixed grinder; whereby grain entering bet ween the upper fixed grinder and the rotating grinder is subject to the grinding process on the uppersurface of the rotating grinder before it can pass through said apertures.

7. In a grinding-mill comprising a fixed grinder and a rotating grinder; the fixed grinder having a central opening through which the grain is admitted to the crevice between the grinding-faces; a cylindrical gate fitted to such annular opening and adapted to be adjusted down past such crevice to close the same, and a centrifugal governor actuated in the train which drives the rotating grinder;

and connections therefrom to such cylindrical gate whereby itregulates the access of grain to the crevice, and thereby to the grindingfaces, according to the speed of the mill.

8. In a grinding-mill in combination with the case; an upper grinding-disk fixed with respect to the case; a lower grinding-disk having its carrier peripherally threaded and screwed into the case; a rotating grindingdisk interposed between the other two, and having its carrier stepped on the bottom of the case, the bottom plate being peripherally threaded and screwed into the wall, the peripheral]y-threaded carrier and the peripherally-threaded bottom plate having each a cogged flange concentric with their threaded peripheries respectively; the shaft of one pinion being a sleeve journaled in the case and the shaft of the other pinion extending through such sleeve and j ournaled beyond it in the case, both of said shafts protruding from thecase, and the inner shaft protruding from the sleeve and each provided with means for rotating it at will; substantially as and for the purposeset forth.

9. In a grinding-mill in combination with the stationary grindin g-disks, the lower of which is vertically adjustable; a rotating grinding-disk feathered on its shaft and adapted thereby to float between the two stationary disks and having its carrier stepped on the case, said step being vertically adjustable, whereby it may be adjusted to any desired distance from the lower stationary grinder and adapted to rise freely toward the upper grinder according to the relative quantity of grain between the rotating grinder and the stationary grinders respectively.

10. In a grinding-mill, a fixed horizontal annular grinding-disk; a rotating horizontal grinding-disk below it,and a stationary grinding-disk below the case in which such grinders are located, having an inlet by which the grain is delivered through the upper annular disk onto the upper side of the rotating disk; said rotating disk having apertures leading through it onto the upper surface of the lower disk; the rotating disk being feathered on its shaft and adapted to float between the two stationary disks, whereby the grain is distributed to both sides of the rotating disk and the latter automatically adjusts itself to the quantity of grain between it and the stationary disks respectively.

In testimony whereof I have hereunto set my hand, in the presence of two witnesses, at Chicago, Illinois, this 11th day of Novem ber, 1895.

4 DE LOSSON llLR-OY BARNAR'D.

WVitnesses: I

FRANK G. HOBART, WILL. A. Goes. 

